/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraSystemViewModel.h
Remove a serialized message from the target function call node inside a script this viewmodel is managing.
void RemoveStackMessage ( const [FGuid](API\Runtime\Core\Misc\FGuid) & MessageKey, [UNiagaraNodeFunctionCall](API\Plugins\NiagaraEditor\UNiagaraNodeFunctionCall) * TargetFunctionCallNode ) const